I agree, more info would be good. When I have grown this, a good misting to avoid red spider mite really helped the plant. Also a good wipe of the leaves with a damp cloth helped too. I have found that bottom leaves do drop with age.
Dr Hessayon "Expert" books are full of useful informaion, if you follow his advice you can't go far wrong.
. Many years ago I had a jungle indoors following his advice.
The great thing is that you can still pick up his books very cheap on ebay or in charity shops., I think the it's called "indoor plant expert"